From: Eli Zaretskii <eliz@gnu.org>
Date: Sat, 7 Oct 2000 18:49:14 +0000 (+0000)
Subject: (find-backup-file-name) [ms-dos]: If support for long
X-Git-Tag: emacs-pretest-21.0.90~1071
X-Git-Url: http://git.eshelyaron.com/gitweb/?a=commitdiff_plain;h=f26d858e50bb795ef9274e9d97089bbf92fce691;p=emacs.git

(find-backup-file-name) [ms-dos]: If support for long
file names is not available, behave as if version-control were set
to never.
---

diff --git a/lisp/files.el b/lisp/files.el
index 6fc452545e5..904d04636f5 100644
--- a/lisp/files.el
+++ b/lisp/files.el
@@ -2386,7 +2386,11 @@ Uses `backup-directory-alist' in the same way as does
     ;; Run a handler for this function so that ange-ftp can refuse to do it.
     (if handler
 	(funcall handler 'find-backup-file-name fn)
-      (if (eq version-control 'never)
+      (if (or (eq version-control 'never)
+	      ;; We don't support numbered backups on plain MS-DOS
+	      ;; when long file names are unavailable.
+	      (and (eq system-type 'ms-dos)
+		   (not (msdos-long-file-names))))
 	  (list (make-backup-file-name fn))
 	(let* ((basic-name (make-backup-file-name-1 fn))
 	       (base-versions (concat (file-name-nondirectory basic-name)